Plasmonic nanostructures based on block copolymer templates for efficient organic solar cells
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- 作者：Seung Jae Go ; Dong-Eun Lee ; Dong Hyun Lee…
- 关键词：Plasmonic ; Block copolymer ; Nanostructure ; Organic solar cell ; Efficiency
- 刊名：Journal of the Korean Physical Society
- 出版年：2016
- 出版时间：January 2016
- 年：2016
- 卷：68
- 期：2
- 页码：257-263
- 全文大小：1,271 KB
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Dong-Eun Lee (1)
Dong Hyun Lee (1)
Byung Doo Chin (1)
1. Department of Polymer Science and Engineering, Dankook University, Yongin, 16890, Korea - 刊物主题：Physics, general; Theoretical, Mathematical and Computational Physics; Particle and Nuclear Physics;
- 出版者：Springer Netherlands
- ISSN：1976-8524
文摘
Plasmonic nanostructures fabricated from self-assembled patterns of block copolymers (BCPs) were applied for organic solar cells (OSCs). A thin film of a cylinder-forming polystrene-block-poly(2-vinylpyridine) copolymer (PS-b-P2VP) was spin-coated on the transparent electrode of the OSCs, where nanostructures such as dot, dot with mixed line, and line patterns emerged during different solvent annealing processes. Selective conversion of hydrogen tetrachloroaurate (III) (HAuCl4) in P2VP blocks yielded gold (Au) nanostructures, which were used to trigger the localized surface plasmonic resonance (LSPR) effect at the OSCs. Plasmonic nanostructures with almost similar scales of BCP patterns were formed at the anode/buffer interface at the OSC, showing no-table enhancements of the short circuit current (J sc) and the power conversion efficiency (3.57% for the reference compared to 4.35% for the optimum LSPR-OSC) as the size and the anisotropy of Au patterns changed from a simple dot through an integrated dot-line pattern to a line pattern. Based on the experimental analyses of the light absorption, photoluminescence, and exciton lifetime of OSC, such an enhancement would be mainly attributed to size-dependent LSPR-induced scattering and absorption at the OSC’s active layer, which is not in intimate contact with the Au nanostructures. Up to a 26% increase in the power conversion efficiency could be observed at the plasmonic structures from BCP template, providing an accurately tuning and powerful tailoring of the LSPR-enhancing patterns for the OSCs. Keywords Plasmonic Block copolymer Nanostructure Organic solar cell Efficiency